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><A
NAME="ROM-IMAGES"
>4.2. ROM images</A
></H1
><P
>Just like a real PC, Bochs needs a system BIOS and VGA BIOS to initialize the
machine when it powers on or after a hardware reset. Bochs needs to load them
from image file into the emulated memory. The Bochs package contains a set of
system BIOS and VGA BIOS images.
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><B
>Table 4-1. System and VGA BIOS images</B
></P
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><COL><COL><THEAD
><TR
><TH
>File</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
>BIOS-bochs-latest </TD
><TD
> default ROM BIOS image for Bochs </TD
></TR
><TR
><TD
>BIOS-bochs-legacy </TD
><TD
> ROM BIOS image without 32-bit init code (for i386 and ISA graphics card emulation) </TD
></TR
><TR
><TD
>bios.bin-1.7.5 </TD
><TD
> SeaBIOS ROM image </TD
></TR
><TR
><TD
>VGABIOS-elpin-2.40 </TD
><TD
> legacy VGA BIOS image for Bochs </TD
></TR
><TR
><TD
>VGABIOS-lgpl-latest </TD
><TD
> LGPL'd VGA BIOS image for Bochs </TD
></TR
><TR
><TD
>VGABIOS-lgpl-latest-debug </TD
><TD
> LGPL'd VGA BIOS image for Bochs with debug output to the logfile </TD
></TR
><TR
><TD
>VGABIOS-lgpl-latest-cirrus </TD
><TD
> LGPL'd VGA BIOS image for Bochs with the Cirrus extension enabled </TD
></TR
><TR
><TD
>VGABIOS-lgpl-latest-cirrus-debug </TD
><TD
> LGPL'd VGA BIOS image for Bochs with the Cirrus extension enabled and debug output to the logfile </TD
></TR
></TBODY
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><P
>Bochs must be set up to use system and VGA BIOS like this:
<PRE
CLASS="SCREEN"
>  romimage: file=BIOS-bochs-latest, address=0xfffe0000
  vgaromimage: file=VGABIOS-lgpl-latest</PRE
>
We recommend to use the ROM images distributed with Bochs or one of the latest
<A
HREF="http://www.seabios.org/"
TARGET="_top"
>SeaBIOS</A
> images. BIOS images designed
for real hardware mostly do not work properly. Please see the <A
HREF="bochsrc.html#BOCHSOPT-ROMIMAGE"
>Section 4.3.8</A
>
for more information.</P
><P
>Bochs supports optional ROM images to be loaded into the ISA ROM space,
typically between C8000 and EFFFF (see <A
HREF="bochsrc.html#BOCHSOPT-OPTROM"
>Section 4.3.10</A
>). The PCI
versions of the Bochs network adapter emulations support loading a boot ROM into
the PCI ROM space (see <A
HREF="bochsrc.html#BOCHSOPT-NE2K"
>Section 4.3.34</A
>).</P
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